VIDEO: Rob Lowe Sports a Mean 'Stache in Drew Peterson: Untouchable

Rob Lowe is sporting quite the 'stache in Drew Peterson: Untouchable, the Lifetime movie based on the titular suspected wife killer.

The Parks and Recreationstar portrays the womanizing police officer Drew Peterson, who was arrested in connection to the killing of his third wife and disappearance of his fourth, who is played by The Big Bang Theory's Kaley Cuoco.

Rob Lowe to play suspected wife-killer Drew Peterson for Lifetime

Peterson's third wife Kathleen was found drowned in a bathtub, and although her death was initially ruled as accidental, Stacy's suspicious disappearance later prompted authorities to exhume Kathleen's body. After another forensic examination revealed signs of struggle before drowning, the cause of death was revised to homicide. Peterson is currently in Will County Jail in Ill., awaiting trial.

Check out the first sneak peek of Untouchable, premiering Jan. 21: